APA
Society of Petroleum Engineers S., . (2003). Pore pressure and fracture gradients. Richardson, Texas: Society of Petroleum Engineers, SPE.
Chicago
Society of Petroleum Engineers SPE, . 2003. Pore pressure and fracture gradients. Richardson, Texas: Society of Petroleum Engineers, SPE.
Harvard
Society of Petroleum Engineers S., . (2003). Pore pressure and fracture gradients. Richardson, Texas: Society of Petroleum Engineers, SPE.
MLA
Society of Petroleum Engineers SPE, . Pore pressure and fracture gradients. Richardson, Texas: Society of Petroleum Engineers, SPE. 2003.